Chain To Astronomical Unit (Ch To Au) Converter

The Chain To Astronomical Unit (Ch To Au) Converter is a handy tool designed to help you easily convert measurements from chains to astronomical units. A chain is a traditional unit of length used mainly in surveying, while an astronomical unit (AU) is a standard measurement used in astronomy to describe distances within our solar system.

One chain (abbreviated as “Ch”) is equal to 66 feet or 22 yards. In decimal form, 1 chain equals approximately 20.1168 meters. An astronomical unit (AU) is approximately 149,597,870.7 kilometers, which is roughly the average distance from the Earth to the Sun.

To convert from chains to astronomical units, you can use the following formula:
AU = (Number of chains × 20.1168 meters) / 149,597,870.7 kilometers

Since the units are different (meters vs. kilometers), ensure you convert meters to kilometers by dividing by 1,000 before performing the division. The simplified formula becomes:
AU = (Number of chains × 0.0201168) / 149.5978707

This converter allows you to input a value in chains and instantly see the equivalent distance in astronomical units, making it easier to understand large-scale measurements in astronomy or land surveying contexts.